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Smooth muscle does not contain troponin, which is a regulatory protein found in skeletal and cardiac muscle. Instead, smooth muscle contraction is regulated by the protein calmodulin, which interacts with calcium ions to activate myosin light chain kinase. This mechanism allows smooth muscle to contract in response to various stimuli, such as hormones and neurotransmitters, without the troponin-tropomyosin complex found in striated muscles.
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What is the atorphy?
Atrophy is the gradual wasting away or decrease in size of a body tissue, organ, or muscle due to underuse or lack of nourishment. It can be caused by factors such as immobility, aging, or certain medical conditions. Physical therapy and exercise can help prevent or reverse atrophy.
Why are sloths so lazy?
Sloths have a slow metabolism due to their diet of leaves, which lack energy. This means they conserve energy by moving slowly and sleeping a lot. Additionally, their low muscle mass contributes to their seemingly lazy behavior.
Can fish be albino?
No. Albinism is an inherited condition present at birth, characterized by a lack of pigment that normally gives color to the skin, fins, hair, and eyes. Many types of albinism exist, all of which involve lack of pigment in varying degrees.
Why do black ants move faster than red ants?
Black ants may appear to move faster than red ants due to variations in their body structure, physiology, and behavioral patterns. Black ants may have longer legs or a different muscle composition that allows them to move more quickly. Additionally, environmental factors such as temperature or humidity may influence the speed of ant movement.
Which body features do bony fish have that sharks do not have?
Sharks, cartilage skeleton, lack scales, lack swim-bladder,Boney Fish. bony skeleton, scales, swim-bladder, interesting colouration.
What muscle that lack striations?
smooth
Do smooth muscle cells posses central nuclei but lack striations?
Smooth muscle is not striated, hence the name smooth muscle.nonotcardiac muscle
Are smooth muscles striated or smooth?
Smooth muscles are not striated, unlike skeletal muscles which have a striped appearance due to the arrangement of actin and myosin fibers. Smooth muscles are more uniform in structure and lack the striations seen in skeletal muscles.
Do smooth muscle cells lack striations?
Yes, smooth muscle cells lack the striations seen in skeletal and cardiac muscle cells. Instead, smooth muscle cells have a more uniform appearance under the microscope due to the absence of organized sarcomeres.
Do skeletal muscles lack the coarse connective tissue sheaths that are found in smooth muscle?
False
Parts and functions of smooth muscle?
Smooth muscle cells contain filaments called actin and myosin that extend the lengths of the cells, but these filaments are organized differently than striated muscle. Smooth muscle cells lack striations and appear "smooth" under the microscope. There are two types of smooth muscle. They are multiunit and visceral. The multiunit are not found in sheets. This found in the irises of the eye and in blood vessels. They respond to nerve stimulation and some hormones. Visceral smooth muscles are found in sheets and they are found in hollow organs. They stimulate each other forming waves. These don't tire easily and do not lose pressure when distended.
How are smoothe muscle cells different from skeletal muscle fibers?
Smooth muscle cells are involuntary and non-striated, meaning they lack the distinct banding pattern seen in skeletal muscle fibers. Unlike skeletal muscle fibers, which are multi-nucleated and have a cylindrical shape, smooth muscle cells are spindle-shaped and typically contain a single nucleus. Additionally, smooth muscle is found in the walls of hollow organs and is responsible for involuntary movements, while skeletal muscle is primarily responsible for voluntary movements and is attached to bones.
How can you tell apart a muscle cell?
Muscle cells can be identified by their elongated and striated appearance, particularly in skeletal muscle, which has a banded pattern due to the arrangement of actin and myosin filaments. They are typically multinucleated, especially in skeletal muscle, whereas cardiac muscle cells have a single central nucleus. Additionally, smooth muscle cells are spindle-shaped and lack striations. The presence of specific proteins like myoglobin in cardiac muscle and smooth muscle's involuntary control further distinguishes them.
What are the General structural and functional differences between a nerve and smooth muscle cell?
The general structural and functional differences between a nerve cell and a smooth muscle cell are as follows. A nerve cell, controls the nervous system and automatic functions a smooth muscle cell is located in the smooth muscle where the nerve cell is.
Why are smooth muscles called smooth?
Smooth muscle is no way connected to the skeleton, example intestine liver etc. Where as striated muscle is connected to skeleton so it is called striated muscle. And the third type of muscle is Cardiac Muscle. --------------------------- Smooth muscle lack the sarcomeres that give skeletal and cardiac muscles their 'striated' appearance. Skeletal muscle isn't "called striated" because it it attached to the skeleton, it is called striated because sarcomeres give muscle a striated appearance. Thus the name, smooth muscle for looking smooth without striation.
What type of muscle cell lacks striations?
Smooth muscle cells lack striations and are characterized by their non-striped appearance. They are found in the walls of hollow organs such as the intestines, blood vessels, and the bladder. Smooth muscle is involuntary, meaning it operates without conscious control, and is responsible for various functions like peristalsis and regulating blood flow.
A muscle cramp is likely due to a lack of?
A muscle cramp is likely due to a lack of
