1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
TEA [102]
4 years ago
13

What is a cross-bridge?

Biology
2 answers:
Burka [1]4 years ago
6 0

Answer:

The correct answer is - option C.

Explanation:

Cross bridge is a structure that is globular made up of the actin filaments and activated myosin attachments. The head of the myosin binds to the binding site that is present on the actin filaments that are exposed to the actin molecules.

Due to this structure, the movement in muscle occurs as they contract while attaching temporarily to the actin filament that is present near and exposed.

Thus, the correct answer is - option C.

devlian [24]4 years ago
3 0

Answer:

d. the movement of myosin head while attached to actin myofilament

Explanation:

During muscle contraction, the calcium ions released from the sarcoplasmic reticulum in the sarcoplasm bind to troponin which in turn removes tropomyosin from the myosin-binding sites present on the actin. Hydrolysis of ATP at the myosin heads energize them. These myosin heads with stored energy bind to the myosin-binding sites on the actin filaments. In their bound conditions on the actin filaments, myosin heads are called cross bridges. Only one myosin head of a single myosin molecule forms cross-bridge at a time.

You might be interested in
What is the position of the body when it is in the ""normal anatomical position?"".
Elis [28]

When the body is in the ""normal anatomical position" it refers to as hominid anatomy.

  • The body is referred to as being in what is known as the typical anatomical position when discussing hominid anatomy.
  • The typical anatomical stance for a human is standing with their feet together and pointing forward, without any long bones being crossed from the observer's point of view.
  • Human anatomy and physiology can be explained in a straightforward and consistent manner using standard anatomical positions.
  • Many anatomical terminology are used to describe the relative placement of different appendages in relation to the standardized position while analyzing an individual's anatomy.

Learn more about the anatomy with the help of the given link:

brainly.com/question/4113194

#SPJ4

5 0
1 year ago
What is the processor in a negative feedback loop
larisa86 [58]

Answer:Negative feedback is a type of regulation in biological systems in which the end product of a process in turn reduces the stimulus of that same process.Sometimes referred to as a “negative feedback loop”, negative feedback occurs when the product of a pathway turns the biochemical pathway off.

Explanation:

4 0
3 years ago
How do enzymes weaken the bonds in substances?
Allisa [31]
Enzymes attach to a particular substrate and weakens the intermolecular forces
5 0
3 years ago
Read 2 more answers
What is the most likely reason that a long beak could be an adaptation for a bird living in a temperature forest?
natita [175]
It probably needs to dig in the ground for worms and grub. So it's an adaptation for finding food.
7 0
3 years ago
Give an example of a theory in science
Nana76 [90]

Answer:

Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry. For example the big bang theory

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which hormone is used in testing for pregnancy?
    11·1 answer
  • What is your definition of the word biochemistry
    12·2 answers
  • Which solution would most likely cause s plant it to become firmer and more rigid
    14·1 answer
  • Whole milk contains calcium and vitamin D to support healthy bones, but food producers cannot make a
    15·2 answers
  • What extra layer of muscle is found in the stomach if the rest of the alimentary canal has mucosa, submucosa, muscularis, and se
    11·2 answers
  • Why can a wolf be considered both a secondary consumer and a tertiary consumer
    6·2 answers
  • Forensic pathologists and anthropologists are usually able to identify the exact moment in time that death occurs.
    15·1 answer
  • If you were a ghost and could possess people, what would you make them do?
    12·2 answers
  • PLEASE WRITE A GOOD ANSWER (NOT FROM THE INTERNET) SO I CAN GIVE SOMEONE THE POINTS.
    10·1 answer
  • If a woman with type a blood has a baby with type ab, a man with type o ____ would be the father
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!