The following is a diagram of a sarcomere.How do the labelled parts change during muscle contraction?
Correct answer: D. Two "A"s move closer together
- A. "D" shortens
- B. "C" stays the same
- C. "B" shortens
- D. Two "A"s move closer together
Explanation
A sarcomere is defined as the distance between two consecutive Z discs or Z lines; when a muscle contracts, the distance between the Z discs is reduced. The H zone-the central region of the A zone-contains only thick filaments and is shortened during contraction. This is correct.D is the sarcomere, a represents Z line, b represents A zone, c represents z disc.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
Practise Scientific Reasoning
334 free Scientific Reasoning MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Scientific Reasoning questions
A bar magnet is placed stationary next to a conducting coil, as shown below.What do we observe in the coil?Choose 1 answer:
What will come at the place of the question mark? 3, 7, 23, 95, ?
Suppose that 20 mL of water and 20 mL of IPA are poured into a beaker, mixed, and then allowed to settle. Based on Student 2's explanation, the resulting con- tents of the beaker would best be represented by which of the following diagrams?
For fixed values of wavelength and x, when the slit width was doubled, the distance from the center of the brightest band in the pattern to the center of one of the 2 adjacent dark bands:
The diagram below represents a process that occurs during human reproduction.What is the result of this process (found on the right side of the arrow)?
Tollen's reagent is an oxidation agent. What are the products of Tollen's reagent reaction with the following molecule?