mistakes Flashcards
(35 cards)
why is calcium (Ca2+) an effective
second messenger?
C) Cytoplasmic Ca2+ is kept low at rest and can be quickly released into the cytoplasm in response
to stimuli
Randy has not eaten for six hours after consuming a carbohydrate-rich lunch. Which metabolic events is most likely occurring?
C) Glycogen in the liver is converted to glucose and released into the bloodstream
In which part of the kidney nephron is most Na+ absorbed?
Proximal Convoluted Tubule
What does albumin do in blood vessels?
Helps keep water in vessels due to osmotic pressure
Which statement best describes the function of the medulla oblongata?
It contains the respiratory and cardiovascular control centres
what is most likely to stimulate a nerve cell in generating an action
potential?
A) An increase in the membrane potential beyond the threshold potential
Slow twitch muscle fibres are:
high in mitochondria and high in myoglobin content
When a skeletal muscle is stimulated by a nerve cell to contract, what is the first
response from the muscle cell?
Release of Ca+ within the muscle cell
Which of the following statements on contractile proteins is correct?
B) When skeletal muscle contracts, myosin heads pull on actin filaments
If a disease weakened slow twitch muscles, but not fast twitch muscles, what effects
might we expect to see?
Lowered use of oxygen by muscles
What is the primary function of osteoclasts?
To resorb bone matrix
What is the valve that blood passes through before reaching the most muscular chamber
of the heart?
B) Left AV (bicuspid) valve
Which of the following statements best describes the mechanism controlling the beating
of the heart?
D) It is controlled by electrical signals generated within the heart
- Which of the following statements best describes “partial pressure”?
D) The pressure exerted by a single gas in a mixture of gases
- What is the primary result when the diaphragm and intercostal muscles contract?
A) The volume of the thoracic cavity increases
Where in the gut does
degradation of fibre primarily occur?
Colon
Which of the following best describes the function of the muscularis externa of the
digestive tract?
C) It contains layers of smooth muscle that are used for peristalsis
Chemical digestion of carbohydrates via the action of amylase occurs in the:
A) Oral cavity and small intestine
When amino acids are combined to form proteins, ATP is converted into ADP. This
process is best described as:
Anabolism
Which of the following statements is most correct about the use of glucose and fatty
acids for ATP production?
Glucose and fatty acids are utilised for aerobic respiration
Which of the following best describes the primary function of B lymphocytes?
To produce antibodies
Which of the following reasons explains why an individual with immunodeficiency might
have an increased risk of developing cancer?
Their immune system is less likely to eradicate cancerous cells
Which of the following statements best describes a unique characteristic of oogenesis
not shared by spermatogenesis?
B) In oogenesis, meiosis is not completed until fertilisation occurs
- Which of the following best orders the sequence of events in development?
A) Cleavage, gastrulation, neurulation, organogenesis
