What stimulates the chemoreceptors to function?
Increase in blood pressure
Decrease in heart rate
Pulmonary congestion
Rise in CO2 and fall in O2.
Correct Answer : D
Chemoreceptors are specialized sensory receptors that detect changes in the chemical composition of the blood, such as the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) and the pH level.
Chemoreceptors can be classified into two types: peripheral and central. Peripheral chemoreceptors are located in the aortic and carotid bodies and they mainly respond to low PO2, but also to high PCO2 and low pH. Central chemoreceptors are located in the brainstem and they mainly respond to high PCO2 and low pH, which reflect the concentration of hydrogen ions in the cerebrospinal fluid. Both types of chemoreceptors send signals to the respiratory and cardiovascular centers in the brainstem, which regulate breathing and blood pressure accordingly.
Increase in blood pressure. This statement is wrong because blood pressure is not directly sensed by chemoreceptors, but by baroreceptors, which are different types of sensory receptors located in the walls of blood vessels. Decrease in heart rate. This statement is wrong because heart rate is not directly sensed by chemoreceptors, but by cardiac receptors, which are different types of sensory receptors located in the atria and ventricles of the heart.Pulmonary congestion. This statement is wrong because pulmonary congestion is not directly sensed by chemoreceptors, but by pulmonary stretch receptors, which are different types of sensory receptors located in the lungs
HESI A2 Exam Quiz Bank
TEAS 7 Exam Quiz Bank
Find More HESI Questions
HESI A2 Questions: We got the latest updated HESI A2 Questions
100% Money Refund: 100% money back guarantee if you take our full
assessment pass with 80% and fail the actual exam.
Live Tutoring: Fully customized live tutoring lessons.
Guaranteed A Grade: All students who use our services pass with 90%
guarantee.
Related Questions
Correct Answer is C
Explanation
Sebaceous glands are microscopic glands in the skin that secrete an oily or waxy substance called sebum into the hair follicles or onto the skin surface.
Sebum lubricates and protects the skin and hair from drying out and from infections caused by bacteria or fungi. Sebum also contributes to body odour.
A. To secrete cerumen or earwax. This statement is wrong because cerumen is produced by specialized sweat glands in the ear canal, not by sebaceous glands. B. To produce hair growth.
This statement is wrong because hair growth is determined by the activity of hair follicles, not by sebaceous glands. Sebaceous glands only deposit sebum on the hairs and bring it to the skin's surface.
D. To excrete perspiration or sweat.
This statement is wrong because perspiration is produced by sweat glands, not by sebaceous glands. Sweat glands are different from sebaceous glands in their structure, location and function. Sweat glands help regulate body temperature and eliminate waste products through the skin.
Correct Answer is D
Explanation
Connective tissue is the most abundant type of tissue in the human body. It is widely distributed and varied, and it includes fibrous tissues, fat, cartilage, bone, bone marrow, and blood.
Choice A is wrong because muscle tissue is not the most abundant type of tissue in the human body. It constitutes around 40% of total body weight and has around 700 muscles.
Choice B is wrong because nervous tissue is not the most abundant type of tissue in the human body. It consists of neurons and neuroglia that transmit and process information.
Choice C is wrong because epithelial tissue is not the most abundant type of tissue in the human body. It covers the body and many of its parts, and forms glands.
Correct Answer is A
Explanation
Sagittal. A sagittal plane divides the body into right and left parts.
The other choices are wrong because:
Choice B. Transverse. A transverse plane divides the body into a top half and bottom half. Choice C. Frontal. A frontal plane divides the body into a front section and a back section. Choice D. Thoracic.Thoracic is not a plane, but a cavity. The thoracic cavity is located in the chest and contains the esophagus, trachea, bronchi, lungs, heart, and large blood vessels.
Correct Answer is B
Explanation
This question was extracted from the actual HESI A2 Exam. Ace your TEAS exam with the actual HESI A2 Exam questions, Start your journey with us today
Visit Naxlex, the Most Trusted HESI Prep Platform With Guaranteed Pass of 90%.
Money back guarantee if you use our service and fail the actual exam. Option of personalised live tutor on your area of weakness.