Nokea
An important function of the intestinal villi is to:
- A. increase the surface area for absorption of nutrients
- B. move chyme along the alimentary canal
- C. form a protective covering for the alimentary canal
- D. synthesise amino acids
Correct Answer: A
Rationale: Intestinal villi are finger-like projections that vastly increase the surface area of the small intestine for nutrient absorption.
You may also like to solve these questions
Which listed substances are all broken down by the liver?
- A. alcohol, drugs, and progesterone
- B. drugs, adrenaline, and urea
- C. oestrogen, water, and drugs
- D. urea, alcohol, and drugs
Correct Answer: D
Rationale: The liver metabolizes various substances including urea, alcohol, and drugs.
Which of the following is not a function of saliva?
- A. to initiate protein digestion
- B. to aid in cleansing the teeth
- C. to lubricate the pharynx
- D. to assist in formation of the bolus
Correct Answer: A
Rationale: Saliva contains amylase for carbohydrate digestion, but it does not initiate protein digestion.
The family of an older adult client is concerned about the client's lack of appetite. The nurse counsels the family initially, recalling that:
- A. The client should be evaluated by the primary care provider
- B. The client is depressed and needs antidepressant medication
- C. Loss of appetite is often associated with substance abuse
- D. Loss of taste buds is a common finding in the elderly
Correct Answer: D
Rationale: Age-related loss of taste buds can reduce appetite in older adults.
Teeth adapted to shear food are:
- A. premolars
- B. canines
- C. incisors
- D. molars
Correct Answer: C
Rationale: Incisors are sharp-edged teeth designed for cutting or shearing food.
Ficks law, describes the effects of various factors on the rate of diffusion. Which statement is true?
- A. The smaller the difference in concentrations the greater the rate of diffusion
- B. The larger the surface area/volume ratio the greater the rate of diffusion
- C. The use of a Transporter Room (as seen in Star Trek) the greater the rate of diffusion
- D. The thicker the exchange surface the greater the rate of diffusion
Correct Answer: B
Rationale: Fick's law states that diffusion rate increases with a larger surface area, steeper concentration gradient, and thinner membrane.