Changes in body during adolescence - class-X
Description: changes in body during adolescence | |
Number of Questions: 41 | |
Created by: Kalki Agrawal | |
Tags: endocrine system and adolescence adolescence biology nervous system and endocrine system life processes in living organism the reproductive system human organ systems the age of adolescence coordination - the linking system control and coordination control and co-ordination in plants and animals reproduction in humans reproduction coordination and response control and coordination in living organisms |
Estrogen is secreted by
-
Corpus albicans
-
Corpus callosum
-
Corpus luteum
-
Cells of Graafian follicles
Estrogens are produced primarily by the ovaries. They are released by the Graafian follicles on the ovaries and are also secreted by the corpus luteum after the egg has been released from the follicle and from the placenta.
Estrogen is secreted by
-
Liver
-
Spleen
-
Ovaries
-
Pituitary
Estrogen is the female sex hormone which is secreted by developing follicles in the ovary. Secretion of gonadotropins during the follicular phase of ovarian cycle stimulate growth and development of follicles. These developing follicles secrete estrogen. Thus, the correct answer is option C.
Which one is a female sex hormone?
-
Estrogen
-
Progesterone
-
Estradiol
-
All of the above
There are two major female sex hormones: estrogen and progesterone. Both of these are steroid hormones. In women, most estradiol is released from the ovaries and adrenal glands. It is also released by the placenta during pregnancy.
Feminizing hormone is
-
Glucagon
-
Gastrin
-
Oestrogen
-
Androgens
The primary function of oestrogen is the development of the female body and secondary sexual characteristics. These include breasts, endometrium, regulation of the menstrual cycle etc. They are present in significantly higher amounts in women after menarche (onset of menstrual periods at puberty) until menopause (cessation of menstrual periods after completion of reproductive age). Hence, oestrogen is a feminizing hormone.
Which part of the ovary in mammals acts as an endocrine gland after ovulation?
-
Stroma
-
Germinal epithelium
-
Graffian follicle
-
Vitelline membrane
Estrogen is secreted by
-
Corpus albicans
-
Corpus callosum
-
Corpus luteum
-
Cells of Graafian follicle
Oestrogens, in females, are produced primarily by the ovaries, and during pregnancy, the placenta. Follicle-stimulating hormone (FSH) stimulates the ovarian production of oestrogens by the granulosa cells of the ovarian follicles and corpora lutea. Synthesis of oestrogens starts in theca interna cells in the ovary, by the synthesis of androstenedione from cholesterol.
Find out the incorrect combination among the following.
-
Pituitary- FSH
-
Thyroid- $T _4$
-
Ovary- Calcitonin
-
Islets of Langerhans- Insulin
Ovaries produce and release two groups of sex hormones progesterone and estrogen.
Which of following is not a protein hormone?
-
Relaxin
-
HCG
-
Placental lactogen
-
Estradiol
Relaxin, HCG and placental lactogen are protein hormones having amino acids bonded together in a polypeptide chain. Estradiol is a steroid hormone and has three cyclohexyl rings and one cyclopentyl ring joined into a single structure. Thus, the correct answer is D.
Which of the following steriod sex hormone influence secondary sex organs?
-
Progesterone
-
Oestrogen
-
LH
-
LTH
Oestrogen is a steroid hormone which is secreted by females gonads. Oestrogen is the hormone which is responsible for the development of secondary sexual characteristics in the female at puberty. It causes the development of breasts, axial and pubic hair and fat distribution. It is also responsible for the maintenance and maturation of the sexual organs in the human body. The hormone also plays role in thickening of the endometrium and other aspects of menstrual cycle and pregnancy.
The homeostatic regulation of an animal requires three basic components, ________ to detect changes, ________ to evaluate the changes and _______ to adjust the changes respectively.
-
Receptors, control center, effectors
-
Brain, spinal cord, effectors
-
Receptors, integrators, effectors
-
Receptors, effectors, integrators
Which is the hormone that brings about changes in girls during puberty?
-
Estrogen
-
Progesterone
-
Testosterone
-
Thyroxine
Estrogen is essential for development of secondary sex organs and external female sex characters like breasts, high pitch voice at puberty. The main function is the tissue growth and cell proliferation in specific areas of body. It promotes the development and maintenance of female reproductive structures. It assists in the control of fluid and electrolyte balance within the body, ensuring that our skin retains moisture. It prepares the follicle for the release of an egg. It controls the changes in our cervical mucus. It prepares our internal environment for fertility making it more sperm friendly.
Ovary produce which hormone?
-
Estrogen
-
hCG
-
HPL
-
Relaxin
Which one of the following conditions correctly describes the manner of determining the sex in the given example
-
Homozygous sex chromosomes (xx) produce male in Drosophila
-
Homozygous sex chromosomes (ZZ) determine female sex in birds
-
XO type of sex chromosomes determines female sex in grasshopper
-
XO condition in human as found in turner syndrome, determines females sex
Corpus luteum releases?
-
Estrogen
-
Progesterone
-
Estrogen and progesterone
-
Androgen
During proliferative phase, mitosis in endometrium is stimulated by ______________.
-
oestrogen
-
FSH
-
progesterone
-
LH
Formation of corpus luteum is induced by
-
LH
-
Estrogen
-
FSH
-
Progesterone
The hormone administered by doctors to a pregnant woman to help in childbirth during the time of natural delivery is ________
-
Oestrogen
-
Progesterone
-
Insulin
-
Relaxin
Female sex hormones are
-
Progesterone
-
Estrogen
-
Testosterone
-
Both A and B
There are two major female sex hormones as estrogen and progesterone. Both of these are steroid hormones and are produced by the ovaries.
Therefore, the correct answer is option D.
The hormone responsible for changes in female at puberty is
-
Estrogen and progesterone
-
Progesterone
-
Testosterone
-
Oxytocin
Estrogens are primary female sex hormones that serve in maturation and maintenance of sex organs, development of female secondary sexual characters and initiation of menstrual cycle. Likewise, progesterone prepares the body for pregnancy and maintain the uterus if pregnancy occurs. Along with estrogens, progesterone helps initiate menstrual cycle in girls entering the puberty. Both enzymes work synergistically.
Estrogens are secreted by
-
Follicle cells
-
Ovary
-
Germinal epithelium
-
Stroma
Estrogen is the female sex hormone. It is mainly secreted by the granulosa cells of the ovarian follicles (in ovary) under the influence of FSH. These hormones are also released by the corpus luteum (after the egg has been released from the follicle) and from the placenta. It is responsible for maintaining the secondary sexual characteristics in female. In males, it helps in the sperm maturation. It also thickens the uterine lining during the menstrual cycle for pregnancy. So, the correct option is A.
Identify the mis-matched pair.
-
Thyroid gland: Thyroxine
-
Ovary: Estrogen
-
Pancreas: Auxin
-
Adrenal medulla: Adrenaline
a) Thyroxine is a thyroid hormone which targets all tissues and stimulates metabolic rate, growth, and development.
Graafian follicle is found in.
-
Testes of rabbit
-
Thyroid of rabbit
-
Ovary of frog
-
Ovary of rabbit
Hormone responsible for the development of secondary sexual characters of female is
-
Progesterone
-
Oxytocin
-
Estrogen
-
Andogen
Female sex hormone is
-
Estrogen
-
Androgen
-
Insulin
-
Adrenaline
Grown up individual may lack sexual traits due to
-
Castration
-
Decreased secretion of sex hormones
-
Excess secretion of sex hormones
-
Glandular disease
Ovarian hormones are usually
-
Proteinaceous
-
Steroids
-
Amines
-
Modified amino acids
Due to deficiency of which hormone, bones becomes weak in female?
-
ACTH
-
TSH
-
Progesterone
-
Oestrogen
Osteoporosis (fragile or weak bones) is very common in women during their menopause because of the depletion of the oestrogen levels in their blood. Oestrogen is a sex hormone which is important for female bone health because it promotes the activity of osteoblasts, which are cells involved in the formation of bone. Thus, the correct option is D.
-
Oxytocin
-
Prolactin
-
Estrogen
-
Gonadotropin releasing factor
Due to deficiency of which hormone, bones become weak in females?
-
Progesterone
-
TSH
-
ACTH
-
Oestrogen
Example of sex hormones secreted by ovary is
-
FSH and LH
-
FSH, LH and progesterone
-
Progesterone and oestrogen
-
FSH, LH, progesterone and oestrogen
At puberty, hypothalamus releases gonadotrohphin releasing hormone (GnRH) which stimulates the anterior pituitary gland. the latter secrete the FSH/LH from the anterior pituitary gland.
FSH- Stimulate the growth of graffian follicle, maturation of ovum, secretion of estrogen by follicle cells. Estrogen, or oestrogen, is the primary female sex hormone. It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics.
LH- The luteinising hormone stimulates release of ovum( ovulation), formation of corpus luteum in the empty follicle and secretion of progesterone from the corpus luteum. Progesterone suspends ovulation during pregnancy, maintains foetal connection with the uterine wall and controls development of foetus in the uterus. If fertilization fails, means no pregnancy so progesterone level decreases to restart the process of ovulation.
So, the correct answer is 'Progesterone and estrogen'.
Assertion : There are several benefits of hormone therapy.
Reason : Hormone therapy (HT) provides women with the female hormones that decrease as they age.
-
If both assertion and reason are true and the reason is the correct explanation of the assertion.
-
If both assertion and reason are true but reason is not the correct explanation of the assertion.
-
If assertion is true but reason is false.
-
If the assertion and reason both are false.
-
If assertion is false but reason is true.
Decreased level of estrogen is common cause of
-
Myasthenia gravis
-
Tetany
-
Osteoporosis
-
Gout
In uterus, endometrium proliferates in response to
-
Relaxin
-
Oxytocin
-
Progesterone
-
Oestrogen
-
LH
The FSH stimulates the follicle cells to secrete estrogen a female sex organ.
Which one controls the secretion of estrogen?
-
hCG
-
Progesterone
-
LH
-
FSH
The failure of estrogens results in eunuchoidism.
-
True
-
False
female eunuchoidism is the case in which the ovaries fail to function at puberty, resulting in infertility, the absence of development of secondary sex characteristics, infantile sexual organs, and excessive growth of the long bones. This is caused by the reduced amount of estrogens or inability of receptors for estrogens to respond.
State whether the following statements are true or false .
In primates, the condition of the failure of testes to descend in the scrotal sac is known as cryptorchidism.
-
True
-
False
A decrease in level of oestrogen and progesterone causes
-
Loss of endometrium
-
Growth of dilation of endometrium
-
Release of ova from ovaries
-
Constriction of uterine blood vessels leading to sloughing of uterine epithelium
- Estrogen: a group of sex hormones that promote the development and maintenance of female characteristics in the human body.
- Progesterone: endogenous steroid and progestogen sex hormone involved in the menstrual cycle, pregnancy, and embryogenesis of humans. It is often called as the "pregnancy hormone".
Decreased levels of estrogen is a common cause for
-
myasthenia gravis
-
tetany
-
osteoporosis
-
gout
The female hormone that causes deposition of fat in the breast, and hips and the growth of pubic hairs during puberty is
-
Estrogen
-
Progesterone
-
Luteinizing hormone
-
Follicle-stimulating hormone
Estrogen, or oestrogen, is the primary female sex hormone. It is responsible for the development and regulation of the female reproductive system and secondary sex characteristics. Estrogens are responsible for the development of female secondary sexual characteristics during puberty, including breast development, widening of the hips, and female fat distribution. Estrogen, in conjunction with growth hormone and its secretory product insulin-like growth factor 1 is critical in mediating breast development during puberty.
Ovulation is controlled mainly by .............. hormone.
-
Estrogen
-
Progesterone
-
Luteinizing hormone
-
Prolactin
- Ovulation is the release of eggs from the ovaries. In humans, this event occurs when the ovarian follicles rupture and release the secondary oocyte ovarian cells.
- The process of ovulation is controlled by the hypothalamus of the brain and through the release of hormones secreted in the anterior lobe of the pituitary gland, luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
- Hence Ovulation is controlled mainly by luteinizing hormone.
- So, the correct answer is 'Luteinizing hormone'.
Osteoporosis, an age related disease of skeletal system, may occur due to
-
Accumulation of uric acid
-
Immune disorder affecting neuromuscular junction
-
High concentration of Ca$^{2+}$ and Na$^+$
-
Decreased level of oestrogen