Lab 3 Questions Flashcards
what are the components of the extracellular matrix in hyaline cartilage?
-ground substance (water, HA, chondroitin, water
-fibre type: collagen
what are the components of the extracellular matrix in compact bone?
-ground substance (calcium phosphate salts and water)
-fibre type: collagen
what components found in compact bone can also be found in spongy bone?
-osteoctyes
-lacunae
-canaliculi
-lamellae
what features are found in cervical vertebrae and not thoracic and lumbar?
-transverse foramina
-bifid spinous processes (split) (only on C2-C6)
what structure passes through the carotid canal?
-carotid artery
what structures pass through the foramen magnum?
-spinal cord
-medulla oblongata
-vertebral arteries + spinal arteries
what structure passes through the foramen ovale
-Mandibular division of cranial nerve V (trigeminal nerve)
what structure passes through the foramen lacerum?
-pharyngeal artery
what structure passes through the jugular foramen?
-jugular vein
-cranial + accessory nerves
is the ethmoid a facial or cranial bone?
-cranial
what is a fontanel and what is its function?
-the soft spots on a fetal skull (covered in dense connective tissue)
-provides flexibility so it can pass through the birth canal without breaking
-provides spaces for growth of the skull and brain
what is a t-tubule?
-areas of the sarcolemma (membrane) that fold back in towards the center of the muscle cell
-allows for close contact to interstitial fluid that is inside the tubule
what structures form myofibrils?
-sarcomeres
what proteins form sarcomeres?
-actin
-troponin
-tropomyosin
-myosin
-titin
what is a triad composed of?
-a t-tubule
-2 terminal cisternae
