interaction with cell components What kinds of microfilamentous structures does each protein help form? 1. Bundling protein; F-actin is org. into diff. assemblies based on cross linking proteins 1. Contractile Bundles- Associated protein-Myosin 2 that always moves to + end of F-actin‚ Non-structurally polar (even tho F-actin is polar by itself)‚ Function-contractions‚ motility‚ ect.‚ examples- stress fibers‚ contractile ring 2. Non-Contractile Bundles- Arranged in tight bundles and
Premium Signal transduction Protein Mitosis
1. Why do we need a cardiovascular system? Because we need to get oxygen through our system. 2. Make sure you know which circuits the left and right heart pump into (pulmonary or systemic). Also know the status of blood (fully oxygenated or not) at -the aorta: Left‚systematic‚ and fully oxygenated. -a pulmonary vein: Left side‚ pulmonary‚ and fully oxygenated. Goes from the right side of the body(heart) into the (left) pulmonary veins then goes to the left atrium then to the left ventricle then
Premium Heart Blood
reactions. ATP is also used in muscle contraction which is obviously essential for numerous animals including human beings. ATP molecules attach to the myosin heads on actin filaments which causes them to become detached. Then the enzyme ATPase (which is activated by calcium ions) hydrolyses the ATP to ADP. The energy lost from the ATP is used to move the myosin heads back to their original positions. Without this mechanism muscles would remain contracted after stimulation and would therefore not be able
Premium Adenosine triphosphate
Human Physiology Exam 2 Spring 2014 1. Neuroglial cells that regulate neurotransmitter metabolism and capillary permeability are: a. neurolemmacytes b. astrocytes c. oligodendrocytes d. neurons 2. The portion of the nervous system concerned with afferent input from skeletal muscle is: a. visceral sensory b. somatic motor c. somatosensory d. propriosensory 3 Light adaptation of the eye occurs due to: a .a decrease in the active photo pigment b. an increase in active photopigment c. a
Premium Brain Neuron Muscle
LABORATORY REPORT Activity: Enzyme Activity Name: Angela Collins Instructor: Catherine Rice Date: 07.09.2014 Predictions Sucrase will have the greatest activity at pH 5 Sucrase will have the greatest activity at 70 °C (158 °F) Sucrase activity increases with increasing sucrose concentration Materials and Methods Effect of pH on Enzyme Activity Dependent Variable amount of product (glucose and fructose) produced Independent Variable pH Controlled Variables temperature‚ amount
Premium Enzyme PH Temperature
increase cAMP levels by inhibiting the enzyme phosphodiesterase (PDE). This enzyme functions is to break down cAMP. (3). Increased cAMP in smooth muscles results in relaxation. This is because cAMP inhibits an enzyme (myosin light chain kinase) that phosphorylates smooth muscle myosin which causes contraction (4). They are also adenosine antagonists (8). Therapeutic uses of xanthines include: mild cases of asthma‚ an adjunct in COPD‚ chronic bronchitis. Side effects of xanthines include: nausea‚ anorexia
Premium
Sample Physiology MCQs 1. Compound action potentials can be graded responses. True 2. The sciatic nerve contains axons of both afferent and efferent neurones. True 3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True 4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True 5. Compound action
Premium Action potential Skeletal muscle Muscle
Introduction This study approaches the understanding of the autosomal recessive “mini-muscle” phenotype in mice. Smaller body size and muscles as well as increased maximal oxygen intake are observed in mice with the “mini-muscle” phenotype. This observation raises an issue about why the selectively bred mice with the “mini-muscle” phenotype have reduced triceps and thigh muscle mass as they are able to cover greater distances; due to faster running speed‚ on an activity wheel compared to normal mice
Premium Gene Obesity Nutrition
~Cross-section of a bone~ Articular cartilage - is a white‚ smooth tissue which covers the ends of bones in joints. Periosteum - is a fibrous sheath that covers bones. It contains the blood vessels and nerves that provide nourishment and sensation to the bone. Cortical bone - forms the outer shell of all bone and also the shafts in long bones. Trabecular bone - is the tissue that makes up the interior of bones.
Premium Bone Skeletal system
Animal Physiology Friday January 13‚ 2012 What are Animals? Invertebrates No spinal column Vertebrates Spinal column Major Animal Phyla Porifera Cnidaria Platyhel-minths Mollusca Annileda Nematoda Arthro-poda Echino-dermata Chordata What is Animal Physiology? What is Physiology? “The study of how animals work” (function) Knut Schmidt-Nielsen (1915–2007) – came up with the whole scheme of animal physiology from cell to whole organism temperature
Premium Action potential Signal transduction Neuron