During the delivery of a baby, the baby’s head is pushing against the cervix causing the cervix wall to stretch. This stretching causes nerve impulses to be sent to the hypothalamus which directs the posterior pituitary to release oxytocin in the blood. Oxytocin stimulates the uterus to contract which pushes the baby’s head deeper into the cervix, stretching it further. This situation is a description of which of the following?

Negative feedback
Positive feedback
Homeostasis
An afferent pathway to an integrating centre
Positive feedback  The stimulus (cervical stretching) causes the integrating centre (the hypothalamus) to respond by enhancing the stimulus โ€“ releasing oxytocin so that the uterus contracts. Enhancing the stimulus is an example of positive feedback. The feedback stops when the cervix is no longer being stretched, that is, when the baby is delivered.
Homeostasis Author: rikazzz

Related posts

If the change in temperature occurs then this change may affect
A. 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

Your email address will not be published. Required fields are marked *