Homeostasis
Select the example below that describes an example of positive feedback.
The hypothalamus, noticing that body temperature is falling, initiates the muscular contractions we know as shivering.
The macula densa of the nephron notices an increase in the sodium ion concentration in the filtrate and signals the afferent arteriole to constrict.
The contractions of the uterus force the head of the foetus against the cervix which causes the uterus to contract more forcefully.
The stretch receptors of the carotid sinus notice that the wall of the carotid artery is more stretched. This information is sent to the brain which then causes the heart rate to decrease.
The contractions of the uterus force the head of the foetus against the cervix which causes the uterus to contract more forcefully.
Examples of positive feedback in human physiology are rare. The contractions of childbirth is one. The other three describe negative feedback.
Related posts
If the change in temperature occurs then this change may affectA. metabolism process
B. functions of enzymes
C. process of diffusion
D. process of osmosis
Role in the maintenance of body temperature and removal of excess water and salts is performed by
A. lungs
B. kidney
C. skin
D. pancreas
The capillaries of the glomerulus arise from
A. efferent arteriole
B. afferent arteriole
C. renal artery
D. bowman’s capsule
The Al-Tasrif is the book based on surgical instruments written by
A. Abu al-Qasim al-Zahrawi
B. Ibn e Sina
C. Ibn ul Haithem
D. Abu Nasr al-Farabi
The reabsorption of salts during urine formation is allowed by
A. descending limp of loop of Henle
B. ascending limp of loop of Henle
C. Bowman’s capsule
D. glomerulus
In human kidneys, the single duct in which distal convoluted tubules opens is called
A. proximal duct
B. renal duct
C. papillary duct
D. collecting duct
The urine is carried to the urinary bladder from kidneys by the
A. gall bladder
B. urethras
C. ureters
D. sclerenchyma tissues
Leave a Reply