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When the baroreceptor reflex is triggered by a decline in blood pressure, baroreceptors in the carotid sinus and aortic arch detect the change and decrease their firing rate. This reduction signals the central nervous system to activate the sympathetic nervous system, leading to increased heart rate and contractility, as well as vasoconstriction of blood vessels. These responses work together to restore blood pressure to normal levels. Additionally, the parasympathetic nervous system is inhibited to further support the increase in blood pressure.
What else can I help you with?
What is a baroreflex?
A baroreflex is a reflex which results from stimulation of a baroreceptor.
Which part of the brain participates in the baroreceptor reflex?
The medulla oblongata, specifically the nucleus tractus solitarius (NTS), is involved in regulating the baroreceptor reflex. The NTS receives input from baroreceptors located in blood vessels, helping to control blood pressure and heart rate.
With reference to the baroreceptor reflex explain why a person who is dehydrated or who has lost a lot of blood has a rapid pulse and cold clammy skin?
When the baroreceptors detect the loss of pressure, they try to return pressure to a homeostatic level. In order to do this, they constrict the blood vessels, which raises the pressure by having the same amount of blood within a smaller "container". The capillaries near the skin will aid in this by restricting flow, causing the skin to be cold and clammy. The baroreceptor reflex also raises the heart rate, which also has the affect of raising blood pressure.
What reflex is triggered to warm your body?
Shivering
What is an example of a stretch reflex triggered by passive muscle movement?
knee jerk reflex
Why does the body vomit?
Vomiting is a natural reflex triggered by the ingestion of toxins. This reflex is an important one to ensure that recognized toxins are expelled from the body.
Why is children more sensitive to oculocardiac reflex?
Children may be more sensitive to the oculocardiac reflex due to their smaller body size and developing nervous system. The reflex is triggered by pressure on the eye, which can be more pronounced in children due to their smaller eye size and more delicate orbital bones. Additionally, the autonomic nervous system in children may be more reactive, leading to a stronger cardiovascular response to the reflex stimulation.
How will blood pressure respond to the valsalva effect?
The Valsalva maneuver typically leads to a transient increase in blood pressure followed by a decrease. During the maneuver, increased intrathoracic pressure reduces venous return to the heart, initially causing a drop in cardiac output and blood pressure. However, the body's baroreceptor reflex responds to this drop by increasing heart rate and constricting blood vessels, which can temporarily raise blood pressure. After the maneuver is released, blood pressure often rebounds as normal venous return resumes.
What reflex occurs when you touch a baby's cheek?
The rooting reflex is triggered when you touch a baby's cheek, causing the baby to turn its head in the direction of the touch and open its mouth in search of food. This reflex helps the baby find the breast or bottle for feeding.
What is Ferguson reflex caused by?
The Ferguson reflex is a physiological response that occurs during labor, specifically during the later stages of childbirth. It is triggered by the stretching of the cervix and the pressure of the baby's head against it, stimulating the release of oxytocin from the pituitary gland. This hormone enhances uterine contractions, promoting the progression of labor. The reflex is named after Dr. John Ferguson, who described this phenomenon in relation to childbirth.
What type of reflex leads to secretion of saliva?
Not really reflex but the presence of food stimulates salivary gland. Sometimes even just the smell or sight of certain food do.
What is the reflex that stimulates mass movements of the colon?
The gastrocolic reflex is the reflex that stimulates mass movements of the colon. It is triggered by the presence of food in the stomach, causing the colon to contract and move its contents towards the rectum for elimination.
