Introduction:
A skeletal system comprises bones, ligament, and cartilage that help an individual in movement and locomotion. Muscles are attached to the skeletal system, which helps in generating the movement. Skeletal system also protects the soft organs of the body.
Answer to Problem 1SA
Correct answer:
A hydrostatic skeletal system consist of a fluid-filled chamber or chambers. Hence, the correct answer is option a.
Explanation of Solution
Reason for correct answer:
Option a. is given as “chamber or chambers.”
Hydrostatic skeletal system is present in soft-bodied invertebrates such as worms and sea anemones. A hydrostatic skeletal is made up of fluid-filled internal chambers. For example, the coelom of an earthworm is divided into many fluid-filled chambers. These chambers help in movement of invertebrates.
Reason for incorrect answer:
Option b. is given as, “hardened plates at the surface of the body.”
An exoskeleton is made up of hard plates at the external part of the body. The exoskeleton is present in arthropods. The hard external shell receives the force of muscle contraction and protects the soft body tissue of the arthropods. Hence, option b. is incorrect.
Option c. is given as, “internal hard plates.”
An endoskeleton consists of internal hard plates. Endoskeleton is present in echinoderms. For example, the endoskeleton of sea stars consists of hardened calcium-rich plates. Hence, option b. is incorrect.
Hence, the options b. and c. are incorrect.
A hydrostatic chamber is made up of a fluid-filled chamber. Hydrostatic skeletal is present in earthworms. Thus, the correct option is c.
Want to see more full solutions like this?
- Betty Greene has been running for several years; however, now her knees hurt, Dr. Morita diagnosed her condition as ______________, which is an abnormal softening of the cartilage in these joints.arrow_forwardFigure 38.19 Which of the following statements about bone tissue is false? Compact bone tissue is made of cylindrical osteons that are aligned such that they travel the length of the bone. Haversian canals contain blood vessels only. Haversian canals contain blood vessels and nerve fibers. Spongy tissue is found on the inferior of the bone, and compact bone tissue is found on the exterior.arrow_forward______are shock pads and flex points. a. Vertebrae b. Cervical bones c. Lumbar bones d. Intervertebral disksarrow_forward
- A/An___________________ is a narrow band of nonelastic, fibrous connective tissues that attached muscle to a bone. aponeurosis fascia ligament tendonarrow_forwardWhen cartilage is compressed, water issqueezed out of it, and when pressure istaken off, water flows back into the matrix.This being the case, why do you think cartilage at weight-bearing joints such as theknees can degenerate from lack of exercise?arrow_forwardSyndesmoses are joints in which bones are held together by: O hydroxyapatite O ligaments cartilage O collagen fibersarrow_forward
- Endochondral ossification is ________.a. the process that replaces hyaline cartilage withbone tissueb. the process by which mesenchyme differentiatesdirectly into bone tissuec. completed before birthd. the process that gives rise to the joint interzoneand future joint cavityarrow_forwardA cartilaginous joint ________.a. has a joint cavityb. is called a symphysis when the bones are unitedby fibrocartilagec. anchors the teeth to the jawsd. is formed by a wide sheet of fibrous connectivetissuearrow_forwardJoints joined together by hyaline cartilage or fibrocartilage would be classified as joints. Multiple Choice diarthrotic cartilaginous synovial fibrousarrow_forward
- Articular cartilagea. connects muscle to boneb. provides a smooth, slippery surface that decreases friction at joint surfacesc. holds the bone in placed. holds the joint togetherarrow_forwardThe internal and external calli are replaced by________.a. hyaline cartilageb. trabecular bonec. osteogenic cellsd. osteoclastsarrow_forwardThe tibia ________.a. has an expanded distal end called the lateralmalleolusb. is not a weight-bearing bonec. is firmly anchored to the fibula by aninterosseous membraned. can be palpated (felt) under the skin only at itsproximal and distal endsarrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax