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Homeostasis
The prominent scientist who wrote a book based on kidney diseases is
ibn e sina
ibn ul Haithem
Abu Nasr al-Farabi
Abu al-Qasim al-Zahrawi
Author:
rikazzz
Comment
Homeostasis
What does the word “homeostasis” refer to?
The steps leading to repair of a blood vessel and the coagulation of blood
The maintenance of internal body conditions within narrow limits
The controlled response that opposes the influence that caused it
The production of blood cells in active bone marrow
This is the best definition. Choice C refers to negative feedback only.
Author:
rikazzz
Comment
Homeostasis
Considering the normal urine composition, the chloride ions content is
4.2g/l
1.87g/l
2.5g/l
3.6g/l
Author:
rikazzz
Comment
Homeostasis
Considering the human blood, the distal convoluted tubule allows reabsorption of
minerals
water
salts
nutrients
Author:
rikazzz
Comment
Homeostasis
At the start of each ovarian cycle, FSH and LH are released. These hormones stimulate the granulosa and thecal cells (respectively) of the follicle that surrounds the ovum. Consequently a few ovarian follicles are stimulated to mature. Which of the listed subsequent developments is an example of positive feedback?
The developing follicle produces estrogens at a low level which act on the anterior pituitary to inhibit the release of FSH and LH.
Granulosa cells secrete inhibin which inhibits the release of FSH.
Rapidly increasing plasma concentration of estrogens stimulates a surge in LH release which stimulates ovulation.
High plasma concentrations of progesterone and estrogen act on the hypothalamus to inhibit the release of GnRH.
The rapidly increasing production of estrogens by the developing follicle stimulates a surge in the release of LH by the anterior pituitary (rather than a decrease). In turn the follicle is stimulated to ovulate which means that the granulosa and thecal cells cease to secrete estrogens. Instead they become the corpus luteum and secrete progesterone.
Author:
rikazzz
Comment
Homeostasis
Plants that live completely or partially submerged in water are called
aquatic plants
hydrophytes
halophytes
xerophytes
Author:
rikazzz
Comment
Homeostasis
Considering the Bowman’s capsule of human kidney, the part of nephron which starts from it is called
renal proximal
renal tubule
renal corpuscle
distal tubule
Author:
rikazzz
Comment
Homeostasis
Considering kidney dialysis, the space around the gut is known as
peritoneal cavity
abdominal cavity
renal cavity
vertebral cavity
Author:
rikazzz
Comment
Homeostasis
The “afferent pathway”, in the description of a feedback loop in homeostasis, refers to the:
Circulating blood
Pathway from the integrating centre to the effector
Outgoing signal
Path taken by the signal produced by a stimulus
The afferent signal is incoming from the receptor to the integrating centre. It may be via the blood but may be via a nerve.
Author:
rikazzz
Comment
Homeostasis
During night time, the by-product of plants is
nitrogen
hydrogen
oxygen
carbon dioxide
Author:
rikazzz
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