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Homeostasis
In humans, the urinary organ kidneys have a width of
4.5 cm
7 cm
6 cm
5 cm
Author:
rikazzz
Comment
Homeostasis
Considering the concave shape of kidneys, the concave side of kidneys faces
renal cavity
abdominal cavity
buccal cavity
vertebral column
Author:
rikazzz
Comment
Homeostasis
Considering the normal urine composition, the water content in percentage is
0.95
0.98
0.97
0.93
Author:
rikazzz
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Homeostasis
If blood pressure is detected to be lower than required to optimally perfuse the tissues, what homeostatic response would occur?
The vasomotor centre would be inhibited and so the heart rate would decrease.
Vasoconstriction would occur; hence, total peripheral resistance would increase.
The strength of myocardial contraction would increase and so stroke vol-ume would decrease
Smooth muscle in the walls of veins would relax resulting in vasodilation.
The homeostatic response to decreased blood pressure is to undertake action to increase blood pressure. Vasoconstriction would achieve this by increasing the peripheral resistance. Choices A and D are the opposite of what would happen.
Author:
rikazzz
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Homeostasis
The plants that are adapted to seawater or salty water environment are called
saprophytes
hydrophytes
xerophytes
halophytes
Author:
rikazzz
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Homeostasis
The body returns to a healthy state after stressful stimuli, thanks to which of the following?
Positive feedback
Metabolism
Anabolism
Negative feedback
Negative feedback is more common than positive feedback.
Author:
rikazzz
Comment
Homeostasis
Which of the following is the efferent pathway for the control of body temperature?
The bloodstream
The hypothalamus
The nerve(s) that connect the brain to the adrenal glands
The core body temperature receptors
Only the bloodstream and nerves are “pathways”. Efferent refers to a signal that is leaving the brain and travelling towards an effector. The signalling by the brain to the adrenal glands to alter the release of epinephrine is one way that body temperature is maintained.
Author:
rikazzz
Comment
Homeostasis
The procedure of maintaining the amounts of salt and water in tissue fluids and blood is called
homeostasis
excretion
osmoregulation
thermoregulation
Author:
rikazzz
Comment
Homeostasis
Synthesis and release of most hormones is regulated by negative feedback. Negative feedback means:
A rise in hormone levels affects the target organ which acts to inhibit further hormone release.
A rise in hormone levels affects the target organ which acts to stimulate further hormone release.
The effect of hormones on target cells does not control further release of hormone.
Neural stimuli result in the release of oxytocin and antidiuretic hormone from the hypothalamus.
When the response opposes a change, it is negative feedback.
Author:
rikazzz
Comment
Homeostasis
Papillary ducts drain into
renal pelvis
collecting ducts
renal corpuscle
renal pyramid
Author:
rikazzz
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