Download Q. Give a feature of the kidney which indicates that it is an

3.4.6 Excretory System 1 FMQuiz Homework Solution
Q. What is meant by the term excretion?
A. Elimination of waste products of metabolism
Q. Name the tube/structure that delivers urine
outside the body.
A. Urethra
Q. State the role of the kidneys in homeostasis.
A. Maintaining water/salt balance; Osmoregulation
Q. What tube/structure connects the kidney to the
bladder?
A. Ureter
Q. Explain the term plasma.
A. Liquid part of the blood
Q. Explain why red blood cells are normally absent
from glomerular filtrate.
A. Too big to pass into Bowman’s capsule
Q. Urea is an excretory product. Name a substance
from which it is derived.
A. Protein or Amino acid
Q. Where in the human kidney does re-absorption
take place?
A. Proximal convoluted tubule
Q. Name the blood vessel that supplies blood to a
kidney.
A. Renal artery
Q. Explain the term glomerular filtrate.
A. Plasma that has entered Bowman’s capsule
Q. Carbon dioxide is an excretory product. Name a
substance from which it is derived.
A. Carbohydrate or Fat or Fatty acids
Q. What is the source of the heat that keeps the
body at a fairly constant temperature?
A. Respiration
Q. From which blood vessel does the renal artery
arise?
A. Aorta
Q. The concentration of glucose is the same in
plasma and glomerular filtrate. Why is this?
A. Glucose is small or passes through
Q. State two responses that result when body
temperature begins to drop.
A. Piloerection; Vasoconstriction; Brain initiates
increased metabolic rate
Q. State two ways in which the body is insulated
against loss of heat.
A. Fat (adipose tissue); Trapped air or Hair
Q. In which cavity of the body are the kidneys
located?
A. Abdominal or Abdomen
Q. Describe the ways in which the body responds
when its internal temperature rises above the
normal level.
A. Vasodilation; Sweat secretion; Hairs lie flat - less
air trapped
Q. Name one substance, other than water,
excreted in the urine.
A. Urea or Salt or Uric acid
Q. Why is glucose normally absent from urine?
A. Usually reabsorbed
Q. Give a feature of the kidney which indicates that
it is an exocrine gland.
A. Has ducts; Does not produce hormones
Q. Explain briefly how sweating assists in the
shedding of excess heat
A. Sweating places a film of water on the body
surface, which is heated by the body; water
evaporates with the heat, body left cooler
Q. Mention one method of excretion in flowering
plants.
A. Diffusion; Leaf fall; Transpiration; Through
lenticels or stomata
Q. What is an endotherm?
A. An animal that produces its own body heat or
Body temperature independent of temperature of
environment
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